β-dibromodehydroalanine was obtained in a one-pot procedure from bis-(N-tert-butyloxycarbonyl)dehydroalanine. The former was reacted with several boronic benzo[b]thiophene acids under Suzuki cross coupling conditions, to give new β,β-bis-(benzo[b]thienyl)dehydroalanines in high yields. These compounds were cyclized to pyrrole derivatives by treatment with Pd(OAc)2 and Cu(OAc)2 in DMF.
的甲基酯叔丁氧基羰基β,被一个一锅法中,从双- (β获得-dibromodehydrOAlanine ñ -叔脱氢丙
氨酸丁氧基羰)。前者在铃木交叉偶联条件下与几种
硼苯并[ b ]
噻吩酸反应,以高收率得到新的β,β-双-(苯并[ b ]
噻吩基)脱氢丙
氨酸。通过在
DMF中用Pd(OAc)2和Cu(OAc)2处理,将这些化合物环化为
吡咯衍
生物。